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@aniruddha-a

aniruddha-a/crepl.sh

Last active Feb 13, 2019
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C REPL
#!/bin/bash
# A REPL for C
# Mon Feb 11, 2019
# Aniruddha. A (aniruddha.a@gmail.com)
if [[ -z $(which gcc) ]]; then
echo gcc not installed
exit 1
fi
readonly FG_BLUE=""
readonly FG_RESET=""
readonly FG_GREEN=""
readonly FG_YELLOW=""
readonly FG_RED=""
readonly LPS1="${FG_BLUE}C> $FG_RESET"
readonly LPS2="${FG_YELLOW}C>> $FG_RESET"
readonly TMPB=$(mktemp --suffix='_creplbuf')
readonly TMPF=$(mktemp --suffix='_crepl.c')
readonly HIST=$(mktemp --suffix='_creplhist')
LPS=$LPS1
cleanup() {
rm -f /tmp/{*_crepl.c,*_creplbuf,*_creplhist}
exit 0
}
trap cleanup SIGINT SIGTERM SIGHUP EXIT
create_tempf() {
truncate -s 0 $TMPF
for i in stdio stdlib stdarg stdbool stddef stdfix stdint string strings limits; do
echo "#include<${i}.h>" >> $TMPF
done
echo "int main() {" >> $TMPF
cat $TMPB >> $TMPF
echo "return 0; }" >> $TMPF
}
dorun() {
local EOUT=$(mktemp --suffix='_crepltmp')
rm -f a.out
create_tempf
gcc $TMPF >& $EOUT
if [[ $? -ne 0 ]]; then
LPS=$LPS2
else
echo -en "$FG_RED"
cat $EOUT | sed "s|$TMPF|<code>|"
./a.out
rm -f a.out
echo -en "$FG_RESET"
LPS=$LPS1
fi
rm -f $EOUT
}
echo -e "Help:\n.clear - start afresh\n.quit - end\n"
while [[ true ]]; do
read -r LINE < <($(dirname $0)/rl -p "$LPS" -H $HIST \
"for(i=0;i<n;i++){}" "while(){}" "return 0;" \
int char float double \
printf scanf strlen sizeof exit struct typedef void true false bool \
.clear .exit .quit)
if [[ $LINE =~ ^[.] ]]; then
if [[ $LINE == '.clear' ]]; then
truncate -s 0 $TMPB
elif [[ $LINE == '.exit' ]] || [[ $LINE == '.quit' ]]; then
rm -f $TMPB $TMPF
echo Bye
exit 0
fi
else
echo -E "$LINE" >> $TMPB
dorun
fi
done
@aniruddha-a

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@aniruddha-a aniruddha-a commented Feb 12, 2019

To use:
Compile the C program in the other gist (rl.c) as rl, and save it to the same directory as this script.

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